--- wikisrc/users/macallan/crime.mdwn 2009/10/21 23:20:05 1.1
+++ wikisrc/users/macallan/crime.mdwn 2009/10/21 23:21:19 1.2
@@ -2,7 +2,7 @@
This is the rendering engine, memory controller etc. found in [SGI](http://www.sgi.com/)'s [[O2]] workstations. NetBSD has hardware accelerated drivers for both the kernel ( [[crmfb]] ) and [[Xorg]] ( [[xf86-video-crime]] ).
Video memory is allocated from main memory in chunks of 64KB which, depending on pixel size, result in 128x128, 256x128 or 512x128 tiles. Output is handled by either [[GBE]] for the VGA port or [[mace]] and the AV module for composite video or s-video ( we don't support TV output yet ).
-The drawing engine has two parts - the main Rendering Engine which supports all kinds of fancy operations including alpha blending, z-buffering and whatnot, and the Memory Transfer Engine which only supports simple fills and copies but is rally, really fast.
+The drawing engine has two parts - the main Rendering Engine which supports all kinds of fancy operations including alpha blending, z-buffering and whatnot, and the Memory Transfer Engine which only supports simple fills and copies but does them really, really fast ( at memory bandwidth speed according to the docs we have ).
Both engines share a set of TLBs:
* Three TLBs map tiled buffers with up to 16x16 tiles. Entries are the upper 16 bit of each tile's physical address so tiles have to be 64KB-aligned.